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          每天进步一点点013 - Colly
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        <h1 id="Preface"><a href="#Preface" class="headerlink" title="Preface"></a>Preface</h1><p>嗯，最近在看一些小说，然后想到之前看过 <strong>go</strong> 有 <strong>colly</strong> 的爬虫框架存在，于是就来试试。<br>反正自己一闲下来就发慌。  </p>
<h1 id="Contents"><a href="#Contents" class="headerlink" title="Contents"></a>Contents</h1><p>目前只是爬到小说列表然后存放到本地 <strong>mongo</strong> 中，然后通过页面的下一页按钮来翻页。<br>当前只爬了 <em>120秒</em> 的数据，也爬了几百条。  </p>
<h2 id="Code"><a href="#Code" class="headerlink" title="Code"></a>Code</h2><figure class="highlight go"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> main</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> (</span><br><span class="line">	<span class="string">&quot;context&quot;</span></span><br><span class="line">	<span class="string">&quot;fmt&quot;</span></span><br><span class="line">	<span class="string">&quot;github.com/gocolly/colly&quot;</span></span><br><span class="line">	<span class="string">&quot;github.com/gocolly/colly/debug&quot;</span></span><br><span class="line">	<span class="string">&quot;github.com/zolamk/colly-mongo-storage/colly/mongo&quot;</span></span><br><span class="line">	<span class="string">&quot;go.mongodb.org/mongo-driver/bson&quot;</span></span><br><span class="line">	mongo2 <span class="string">&quot;go.mongodb.org/mongo-driver/mongo&quot;</span></span><br><span class="line">	<span class="string">&quot;go.mongodb.org/mongo-driver/mongo/options&quot;</span></span><br><span class="line">	<span class="string">&quot;time&quot;</span></span><br><span class="line">)</span><br><span class="line"></span><br><span class="line"><span class="keyword">type</span> Book <span class="keyword">struct</span> &#123;</span><br><span class="line">	Title <span class="keyword">string</span> <span class="string">`json:&quot;title&quot;`</span></span><br><span class="line">	Author <span class="keyword">string</span> 	<span class="string">`json:&quot;author&quot;`</span></span><br><span class="line">	Tag <span class="keyword">string</span>	<span class="string">`json:&quot;tag&quot;`</span></span><br><span class="line">	Hot <span class="keyword">string</span>	<span class="string">`json:&quot;hot&quot;`</span></span><br><span class="line">	Chars <span class="keyword">string</span> <span class="string">`json:&quot;chars&quot;`</span></span><br><span class="line">&#125; </span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> (</span><br><span class="line">	ROOT_URL  = <span class="string">&quot;http://xsw.xyz/shuku/&quot;</span></span><br><span class="line">	MONGO_URI = <span class="string">&quot;mongodb://localhost:27017&quot;</span></span><br><span class="line">)</span><br><span class="line"><span class="keyword">var</span> coll *mongo2.Collection</span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">init</span><span class="params">()</span></span>  &#123;</span><br><span class="line">	client, err := mongo2.NewClient(options.Client().ApplyURI(MONGO_URI))</span><br><span class="line">	<span class="keyword">if</span> err != <span class="literal">nil</span> &#123;</span><br><span class="line">		<span class="built_in">panic</span>(err)</span><br><span class="line">	&#125;</span><br><span class="line">	ctx,_ := context.WithTimeout(context.Background(), <span class="number">10</span>*time.Second)</span><br><span class="line">	err = client.Connect(ctx)</span><br><span class="line">	<span class="keyword">if</span> err != <span class="literal">nil</span> &#123;</span><br><span class="line">		<span class="built_in">panic</span>(err)</span><br><span class="line">	&#125;</span><br><span class="line">	coll = client.Database(<span class="string">&quot;xsw&quot;</span>).Collection(<span class="string">&quot;book_list&quot;</span>)</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">func</span> <span class="title">main</span><span class="params">()</span></span>  &#123;</span><br><span class="line">	c := colly.NewCollector(</span><br><span class="line">		colly.Debugger(&amp;debug.LogDebugger&#123;&#125;),</span><br><span class="line">		colly.AllowedDomains(<span class="string">&quot;xsw.xyz&quot;</span>),</span><br><span class="line">		colly.CacheDir(<span class="string">&quot;./xsw&quot;</span>),</span><br><span class="line">		colly.UserAgent(<span class="string">&quot;xsw&quot;</span>),</span><br><span class="line">		colly.Async(<span class="literal">true</span>),</span><br><span class="line">		)</span><br><span class="line">	storage := &amp;mongo.Storage&#123;</span><br><span class="line">		Database:<span class="string">&quot;books_xsw&quot;</span>,</span><br><span class="line">		URI:MONGO_URI,</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="keyword">if</span> err := c.SetStorage(storage); err != <span class="literal">nil</span> &#123;</span><br><span class="line">		<span class="built_in">panic</span>(err)</span><br><span class="line">	&#125;</span><br><span class="line">	c.Limit(&amp;colly.LimitRule&#123;</span><br><span class="line">		DomainGlob:<span class="string">&quot;xsw.*,&quot;</span>,</span><br><span class="line">		Parallelism:<span class="number">2</span>,</span><br><span class="line">		RandomDelay:<span class="number">3</span>*time.Second,</span><br><span class="line">	&#125;)</span><br><span class="line">	detailCollector := c.Clone()</span><br><span class="line">	c.OnHTML(<span class="string">&quot;.container .mod .bd&quot;</span>, <span class="function"><span class="keyword">func</span><span class="params">(e *colly.HTMLElement)</span></span> &#123;</span><br><span class="line">		fmt.Println(<span class="string">&quot;found list&quot;</span>)</span><br><span class="line">		e.ForEach(<span class="string">&quot;ul .column-2&quot;</span>, <span class="function"><span class="keyword">func</span><span class="params">(_ <span class="keyword">int</span>, el *colly.HTMLElement)</span></span> &#123;</span><br><span class="line">			title := el.ChildText(<span class="string">&quot;.right .name&quot;</span>)</span><br><span class="line">			author := el.ChildText(<span class="string">&quot;.info .author&quot;</span>)</span><br><span class="line">			words := el.ChildText(<span class="string">&quot;.info .words&quot;</span>)</span><br><span class="line">			update := el.ChildText(<span class="string">&quot;.info font&quot;</span>)</span><br><span class="line">			ctx,_ := context.WithTimeout(context.Background(), <span class="number">3</span>*time.Second)</span><br><span class="line">			_,err := coll.InsertOne(ctx,bson.M&#123;<span class="string">&quot;title&quot;</span>:title,<span class="string">&quot;author&quot;</span>:author,<span class="string">&quot;words&quot;</span>:words,<span class="string">&quot;update&quot;</span>:update&#125;)</span><br><span class="line">			<span class="keyword">if</span> err != <span class="literal">nil</span> &#123;</span><br><span class="line">				fmt.Println(err)</span><br><span class="line">			&#125;</span><br><span class="line">		&#125;)</span><br><span class="line">	&#125;)</span><br><span class="line">	c.OnHTML(<span class="string">&quot;.nextPage&quot;</span>, <span class="function"><span class="keyword">func</span><span class="params">(e *colly.HTMLElement)</span></span> &#123;</span><br><span class="line">		e.Request.Visit(e.Attr(<span class="string">&quot;href&quot;</span>))</span><br><span class="line">	&#125;)</span><br><span class="line">	c.OnError(<span class="function"><span class="keyword">func</span><span class="params">(response *colly.Response, e error)</span></span> &#123;</span><br><span class="line">		fmt.Println(<span class="string">&quot;Request URL&quot;</span>,response.Request.URL,<span class="string">&quot;, failed with response:&quot;</span>,response,<span class="string">&quot;\nError:&quot;</span>,e)</span><br><span class="line">	&#125;)</span><br><span class="line">	detailCollector.OnHTML(<span class="string">&quot;div[mod block book-all-list]&quot;</span>, <span class="function"><span class="keyword">func</span><span class="params">(e *colly.HTMLElement)</span></span> &#123;</span><br><span class="line">		</span><br><span class="line">	&#125;)</span><br><span class="line">	c.Visit(ROOT_URL)</span><br><span class="line">	time.Sleep(<span class="number">120</span>*time.Second)</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="Description"><a href="#Description" class="headerlink" title="Description"></a>Description</h2><p>主要是通过读取小说的书库的第一页，解析单页的小说列表中的内容，存入 <strong>mongo</strong> ，然后访问下一页。<br>需要注意的是页面元素的筛选需要去复习一遍 <strong>jquery</strong> 的 <strong>selector</strong> 。   </p>
<h1 id="Reference"><a href="#Reference" class="headerlink" title="Reference"></a>Reference</h1><ul>
<li><a target="_blank" rel="external nofollow noopener noreferrer" href="https://github.com/gocolly/colly/blob/master/cmd/colly/colly.go">colly</a></li>
<li><a target="_blank" rel="external nofollow noopener noreferrer" href="https://www.cnblogs.com/shanyou/archive/2011/07/11/2103422.html">jQuery操作Select</a></li>
<li><a target="_blank" rel="external nofollow noopener noreferrer" href="https://github.com/mongodb/mongo-go-driver">mongo-go-driver</a></li>
<li><a target="_blank" rel="external nofollow noopener noreferrer" href="http://go-colly.org/docs/examples">go colly examples</a></li>
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